JP3721541B2 - Manufacturing method of seat cushion - Google Patents

Description

[0001]
[Industrial application fields]
The present invention mainly relates to a method for manufacturing a cushion body for a seat of an automobile or the like in which a seat cover is formed by sewing a skin layered with a surface fabric and a lining fabric, and the seat cover is bonded to a seat pad.
[0002]
[Prior art]
As a method of manufacturing a sheet for adhering a seat cover to a pad, a method of adhering the seat cover to a seat pad such as urethane by embossing through an adhesive spray-applied to a urethane pad is adopted. In the manufacturing method, there is a defect that the adhesive cannot be applied uniformly and uneven adhesion occurs, and the spray application deteriorates the working environment.
[0003]
Therefore, as described in Japanese Patent Publication No. 4-64300, by using a hot melt adhesive sheet such as a web or a film as the adhesive, uneven adhesion can be avoided and the working environment can be improved. Improvements have been made. Furthermore, by laminating the adhesive sheet on the back surface, the positional deviation of the adhesive sheet is prevented and workability is improved.
[0004]
[Problems to be solved by the invention]
However, the cushion body for a seat thus configured has a hot melt adhesive sheet that is weak with respect to the tearing strength, so that a rupture as shown in FIG. 5 sometimes occurs depending on the degree of quilting between the outer fabric and the lining fabric. Sometimes, the uneven pattern of the design quilt is blurred. In addition, even when the seat cover is formed by sewing the skin, the sewing speed cannot be increased because the adhesive sheet may be torn by sewing.
[0005]
The present invention has been made on the basis of the above circumstances, the purpose of which is that the quilt pattern becomes clear, the adhesive sheet does not tear even at high-speed sewing, and can be evenly bonded, such as spray coating, It is in providing the manufacturing method of the cushion body for seats which can be manufactured in the form without the possibility of environmental pollution by an adhesive agent.
[0006]
[Means for Solving the Problems]
To achieve the above object, the present invention is to laminate the hot melt adhesive lining cloth constituting the adhesive backing fabric, slab urethane state through between the urethane slab and the adhesive backing cloth and Outer fabric After melting and laminating to make a skin, the skin is cut and subjected to predetermined quilting, and then sewn with the town skin to form a seat cover . Steam or hot air is emitted to melt the hot melt adhesive, and the seat cover is adhered to a seat pad.
[0007]
[Action]
The present invention laminates an adhesive lining fabric laminated with a hot-melt adhesive and a surface fabric by melting slab urethane with a urethane slab interposed therebetween to form a skin, and this skin is cut and subjected to predetermined quilting. After being applied, the seat cover is formed by sewing with the town skin, the sheet cover is embossed on a seat pad, high-temperature steam or hot air is emitted through the mold, and the hot melt adhesive is melted. Adhere to the seat pad. Accordingly, since a material having a high tear strength can be selected for the backing cloth, damage due to quilting is torn and high-speed sewing is possible. Since the hot melt adhesive is laminated on the backing cloth, unlike spray coating, there is no uneven coating and the working environment is not deteriorated.
[0008]
【Example】
Embodiments of the present invention will be specifically described below with reference to the drawings.
The manufacturing method of the cushion body for seats of the present invention is realized by the following processes. That is, for example, a nylon-based or polyester-based hot melt adhesive 4 is laminated on the backing cloth 2 in advance to form an adhesive backing cloth (see FIG. 1).
The lining fabric 2 has a breathable property and has sufficient strength against quilting, and is preferably a nonwoven fabric or a woven fabric such as a knit, particularly preferably a polyester fiber that is materially resistant to tear strength. Alternatively, a woven fabric of nylon fiber is employed.
[0009]
For laminating the hot melt adhesive 4, a method of laminating a cloth or net adhesive on the backing cloth 2 and fixing by heating is adopted. In addition, a method of laminating powder or film is adopted. May be.
[0010]
Next, the outer fabric 1 and the backing fabric 2 are laminated by a frame laminating method in which the urethane slab is melted with the urethane slab 3 interposed therebetween. Cut this skin and quilt it. Thereafter, the seat cover A is constructed by sewing with the town skin (see FIG. 2).
[0011]
The seat cover A thus configured is placed on a separately prepared seat pad B (see FIG. 3), these are placed on the lower die 5, the upper die 6 is lowered, and the embossing is performed. Thus, the seat cover A is joined to the seat pad B (see FIG. 4). At this time, high temperature steam, high temperature air or the like is supplied into the upper mold 6, and the hot melt adhesive 4 of the seat cover A is heated and melted through the upper mold 6, so that the seat cover A and the seat pad B are heated. To achieve adhesion.
[0012]
After that, in order to solidify the adhesive, the sheet cover A, that is, the portion to be bonded by the hot melt adhesive 4 is cooled through the upper mold 6 by passing a coolant such as cooling air through the upper mold 6. Of course.
[0013]
As a result, the following advantages can be obtained.
1) Since a material strong in tearing strength can be selected for the lining cloth, damage due to quilting can be avoided, and the seat cover made by reliable quilting can clearly show the quilted pattern.
[0014]
2) Since a material strong in tearing strength can be selected for the lining cloth, damage to the adhesive lining cloth during sewing of the skin can be avoided, and sewing can be performed at high speed.
[0015]
3) Since the hot melt adhesive is laminated on the backing cloth, unlike spray coating, there is no uneven coating and the adhesive strength of the seat cover is stable.
4) For the same reason, unlike the case of spray coating, the working environment is not deteriorated.
[0016]
5) In particular, when powder is used for the hot melt adhesive, the lining cloth is not clogged, so that air permeability in the case of a seat cushion can be secured.
6) Since the adhesive backing cloth is laminated in advance on the back of the outer cloth, the positional deviation of the adhesion can be prevented and the workability is improved.
[0017]
【The invention's effect】
As described in detail above, the present invention laminates a hot melt adhesive on a lining cloth that maintains air permeability, laminates the adhesive lining cloth on a surface cloth, cuts and sews to form a seat cover, When the mold is pressed onto the seat pad, the hot melt adhesive is melted with high-temperature steam or hot air through the mold to bond the seat cover to the seat pad.
Therefore, the quilt pattern can be clearly displayed, the adhesive lining fabric can be prevented from tearing even at high-speed sewing, and it can be evenly bonded and can be manufactured in such a way that there is no risk of environmental pollution due to adhesives such as spray coating. Is obtained.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a longitudinal side view schematically showing a state of lamination of an adhesive to a backing cloth in an embodiment according to the present invention.
FIG. 2 is a longitudinal sectional view and a perspective view of a seat cover, similarly showing quilting conditions in (A) and (B).
FIG. 3 is a schematic cross-sectional view showing the latter stage of the manufacturing method of the present invention.
FIG. 4 is a schematic cross-sectional view showing a state of embossing similarly.
FIG. 5 is a schematic longitudinal side view for explaining a conventional example.
[Explanation of symbols]
1 Surface fabric 2 Lining fabric 3 Urethane slab 4 Hot melt adhesive 5 Lower mold 6 Upper mold A Seat cover B Seat pad

Claims (1)

A hot melt adhesive is laminated to the lining fabric to form an adhesive lining fabric, and the adhesive lining fabric and the outer fabric are laminated by melting slab urethane with a urethane slab interposed between them to form an epidermis. After cutting the sheet and applying the specified quilting, the seat cover is constructed by sewing with the town skin, the sheet cover is embossed on the seat pad, hot steam or hot air is emitted through the mold, and the hot melt bonding is performed. A method for producing a cushion member for a seat, comprising melting the agent and bonding the seat cover to a seat pad.

Images